Engine Management and Tuning Crome, NepTune, Hondata, AEM, MOTEC

a/f numbers dont match

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Old Sep 26, 2012 | 07:02 PM
  #1  
orioncivic's Avatar
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From: montgomery, il, usa
Default a/f numbers dont match

ok ive got more or less a poor mans type r, p28 w/s300. 800cc inj. I'm trying to setup a break in tune till I go boost. My problem is my a/f at my gauge does not match up for the a/f numbers in the hondata datalog screen. I have my wideband wired thru the eld with the resistors cut. The offset is at -.13. I notice that at certain areas( not all) my a/f dont match the datalog, I'll be at 14.5 on comp. and 13.5 on gauge. If I open the gauges screen and comare the a/f there it is dead on(with in .1 off). Anyone else seen this?
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Old Sep 26, 2012 | 09:23 PM
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Default Re: a/f numbers dont match

What wideband are you using?
What settings are you using for voltage vs air fuel ?
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Old Sep 28, 2012 | 06:37 PM
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From: montgomery, il, usa
Default Re: a/f numbers dont match

I'm using a aem wideband, the voltage offset is -0.2. and the voltage/lambda conversion table is 0.00 voltage=10.00 a/f, 5.00=20.00 a/f, and 5.00=20.00 a/f. ( that is 3 columns for that table.) not sure why the factory setting has the same numbers twice for the 5.00=20.00 ratio, should the middle be changed to 2.5=15 ?
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Old Sep 29, 2012 | 02:53 AM
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Default Re: a/f numbers dont match

Try 0 volts = 10.00 and 2.29 volts = 14.70 a/f and 5 volts = 19.98 a/f

What input are you using on the ecu?
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Old Sep 29, 2012 | 07:28 AM
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From: montgomery, il, usa
Default Re: a/f numbers dont match

eld with r136 and r138 resistor cut. I'll try the new input this afternoon. Thx btw anything going on car related in tampa area between the 5 and 13 of oct.? I'm going to be in dunedin then.
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Old Sep 29, 2012 | 09:49 AM
  #6  
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Default Re: a/f numbers dont match

Originally Posted by orioncivic
eld with r136 and r138 resistor cut. I'll try the new input this afternoon. Thx btw anything going on car related in tampa area between the 5 and 13 of oct.? I'm going to be in dunedin then.
IFO is Oct 7th
www.importfaceoff.net


The ELD input should work fine with the settings I suggested.
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Old Sep 29, 2012 | 07:18 PM
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Default Re: a/f numbers dont match

ok thx, gainsville is a little out of the way.... ill check out the new settings tomorrow. Thx again
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